Mat



FIG. 1 is a front/right/top perspective view of a mat showing my new design; the front/left/top perspective view being a mirror image thereof;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof, the left side view being a mirror image thereof; and,

FIG. 4 is a front elevational view, the rear being a mirror image thereof.

The broken lines form no part of the claimed design. 

CLAIM I claim the ornamental design for a mat, as shown and described. 